8 条题解
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4
#include <iostream> using namespace std; int n,r; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1); } for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0; } -
2
二位前缀
#include<iostream> #include<algorithm> using namespace std; const int N=1e5+5,INF=0x3f3f3f3f; typedef long long LL; int n,x,y,v,r,ans=0; int f[9241][5780]; int main() { cin>>n>>r; int a=r,b=r; for(int i=1;i<=n;i++) { cin>>x>>y>>v; x++,y++; f[x][y]+=v; a=max(a,x);b=max(b,y); } for(int i=1;i<=a;i++)for(int j=1;j<=b;j++)f[i][j]+=f[i-1][j]+f[i][j-1]-f[i-1][j-1]; for(int i=r;i<=a;i++)for(int j=r;j<=b;j++)ans=max(ans,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); cout<<ans; return 0; } -
0
sng2025125
LV 6
@ 2026-11-1 18:43:23
#include using namespace std; int n,r; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1);
} for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0;}
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-1
jinhongxian LV 7 @ 2025-3-29 18:46:13
#include using namespace std; int n,r; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1);
} for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0;}
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-3
shihaichen LV 6 @ 2024-3-29 18:32:40
#include using namespace std; int n,r; // struct target{ // int x; // int y; // int w; // }a[10000]; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1);
}// ]; f[1][0] += f[0][0]; // f[0][1] += f[0][0 for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } // f[1][0] += f[0][0]; // f[0][1] += f[0][0]; // for(int i=1;i<=XMAX;i++) // { // for(int j=1;j<=YMAX;j++) // cout<<f[i][j]<<" "; // cout<<endl; // } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0; }``
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-3
#include <iostream> using namespace std; int n,r; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1); } for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0; } -
-4
#include <iostream> using namespace std; int n,r; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1); } for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0; } -
-7
#include <iostream> using namespace std; int n,r; // struct target{ // int x; // int y; // int w; // }a[10000]; int cnt; int maxx = -1; int XMAX = -1; int YMAX = -1; int f[5002][5002]; int main() { cin>>n>>r; XMAX = r; YMAX = r; for(int i=0;i<n;i++) { int x,y,w; cin>>x>>y>>w; f[x+1][y+1] += w; XMAX = max(XMAX,x+1); YMAX = max(YMAX,y+1); } // ]; f[1][0] += f[0][0]; // f[0][1] += f[0][0 for(int i=1;i<=XMAX;i++) { for(int j=1;j<=YMAX;j++) { f[i][j] += f[i-1][j] + f[i][j-1] - f[i-1][j-1]; } } // f[1][0] += f[0][0]; // f[0][1] += f[0][0]; // for(int i=1;i<=XMAX;i++) // { // for(int j=1;j<=YMAX;j++) // cout<<f[i][j]<<" "; // cout<<endl; // } for(int i=r;i<=XMAX;i++) { for(int j=r;j<=YMAX;j++) { maxx=max(maxx,f[i][j]-f[i-r][j]-f[i][j-r]+f[i-r][j-r]); } } cout<<maxx<<endl; return 0; }``
2024sng008
LV 9
@ 2025-1-26 11:02:25
- 1